Added link to keyboard shortcuts

doc/workflow/README.md

@@ -13,4 +13,5 @@
 - [Project importing from GitLab.com to your private GitLab instance](import_projects_from_gitlab_com.md)
 - [Protected branches](protected_branches.md)
 - [Change your time zone](timezone.md)
+- [Keyboard shortcuts](keyboard_shortcuts.md)
 - [Web Editor](web_editor.md)
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